I’m not sure whether it’s a plugin problem, a recent wordpress upgrade or a problem at the erver side of things, but for whatever reason the links to the post categories aren’t working, making navigating the site very difficult. I’ll have it working as soon as possible.
edit: It seems to be related to the permalink structure of the site, and by changing it to default settings rather than the custom one I was using everything works as intended. It’s not ideal but it’ll do for now. Thanks to dgwyer on the WP forums for the tip on the cause.